Apparatus for controlling the boiling of sugar-juices.



No. 66|,756. Patented Nov. I3, |900.

H. CLAASSEN.

APPARATUS FOR CONTROLLING THE BUILING 0F SUGAR JUICES.

(Application led Jan. 4. 1900.)

(N o M o d al mi Norms Pzzns ce. pHoro-umu.. warum-mm, n. c.

UNITED STATES PATENT OEEICE.

HERMANN CLAASSEN, OF DORMAGEN, GERMANY.

APPARATUS FOR CONTROLLING THE BOILlNG OF SUGAR-JUICES.

SPECIFICATION forming part of Letters Patent No. 661,756, dated November 13, 1 900.

Application filed January 4, 1900. serial No. 302. (No modela To all wtowt it may conc/wtf Be it known that I, HERMANN CLAAssEN, a subject of the King of Prussia, Emperor of Germany, and a resident of Dormagen, Rhenish Prussia, German Empire, have invented a new and useful Improvement in Apparatus for Controlling the Boiling of Sugar-Juices, of which the following is a specification.

In order to properly boil sugar-j uices in the manufacture of' sugar either to string-proof or to grain, itis necessary to maintain at each stage of' the boiling process a distinct superconcentration ot the mother-syrup. The degree of the most suitable superconcentration will depend upon the purity of the syrups and will correspond at each temperature to a distinct percentage of water in the syrups. As the purity of syrups of the same kind will change very little and the degree of purity being sufciently known by daily tests, the important question is to readily ascertain in a continuous manner the percentage of water in the Syrups in the vacuum boiling-pan in order to accurately and without loss of time regulate such percentage according to the boiling temperature as fixed by established tables.

Now this invention has for its object to provide simple and efficient means to facilitate the ready ascertaining of the various conditions of the contents of the vacuum-pan in order that the operator may control, establish, and regulate the same, and to Vthis end my invention consists in the arrangement and combination ot parts to be hereinafter described and claimed.

The apparatus is illustrated on the annexed drawings, in whieh--' Figure l shows a face view of the calculating device or scale embodying my invention. Fig. 2 is a face view of a table to be used with the apparatus. Fig. 3 is a side elevation thereof with the slide in place. Fig. et is a face view of a slide to be used with the table, as will be hereinafter more fully described.

The calculating device preferably consists in two scales L and T, ixed on a base n, on which are mounted guides o p, upon which a slide S works. This slide S is provided with a fixed indicator O, which coperates with the scales L and T and is moved by a handle q, provided with a pinion r, which meshes with a rack r on the guide p. On the slide S there are also two scales u o, the scale u indicating from lC to 30 centigrade, the degrees of' temperature in excess ot' the boiling-point of water possessed by syrups at equal vacuo, the indices of the right-hand scale indicating` the percentage ot water of the syrup when they have a boiling-point standing exactly opposite said indices, the idea being to provide two scales in such relation to each other that upon setting a movable pointer Z on the scale o opposite the indication of any given water contents or percentage of water the proper boiling-point in excess of' the boiling-point of water will be indicated by the same indicator upon the neighboring scale u. The scale marked T indicates the degrees of temperature, the scales u and T showing their temperature indications as drawn to the same scale of reference. The scale L, which is placed iu proximity to the scale T, indicates the vacuo. It will be observed that the dev grecs of this scale L increase in size. it will likewise be observed that the indices on the scale L and T are so correlated with each other that a single index or pointer O may be employed, and when so employed will indicate on the scale L a certain vacuum and on the scale T the boiling-point of water at that vacuum, and it is for this purpose that the degrees of vacuo as marked on the scale L necessarily increase in size.

In Figs. 2, 3, and 4f I have shown a table s, having vertical and horizontal rows of figures giving the percentage of water in the mass in the vacuum-pan at the various temperatures and stages of boiling. This table is recessed to receive a slide t, which is apertu red at a; and is marked with a list of temperatures corresponding to the temperatures in the boiling-point column of the table s. The slide is movable back and forth on the table s in order to bring the temperature-table on the slide opposite the proper figures on the table .5'. The figures of the said table will differ according to the purpose in view, so that those shown in the table will stand for a special or distinct process only in order that the operator will only see that row of figures which corresponds to the stage of boiling for the time being.

The mode ot using the apparatus is very IOC) simple. Suppose it is desired to boil juice of 75o purity. The vacuum-gage is consultedand the tixed indicator O of the slide S is shifted to that point of the scale L which corresponds to the vacuum existing in the boiling apparatus. The desired water contents or water percentage of the ina-ss is then read from the tables and the movable indicator Z is shifted until it points on the scale o to the desired water eonteu ts. This movable pointer will then show on the temperature-scale the desired temperature at which the sugar juice orsyrup is to be boiled and maintained and will also show on the scale u the temperature in excess of the boiling-point of water possessed by the syrups at corresponding vacuo.

Having described my invention, what l claim, and desire to secure by Letters Patent, is-

l. In an apparatus for use in regulating the superconcentration of boiling sugar juices or syru ps under vacuo and the temperature thereof and for use in controlling such superconeentration and temperature, the combination in a unitary structure of a vacuumscale L and a ten'iperatine-scale T so correlated with each other that the boiling temperature of water at any given vacuum may be directly read, a sliding` double scale S consisting of a scale u fo1"indicatiug boiling temperatures of sugar juices and syl-ups and a scale o indicating the percentage of water at such boiling` temperature, the said two scales being so correlated with each other that the water percentage at any given boiling temperature may be directly read from the scale, a xed indicator carried by the double sliding scale and cooperating with the vacuum and temperature scales L T and a sliding indicator Z cooperating with the scales u o and the scale T substantially as described, .vhereby when the fixed indicator is set on the scales L and T, and the movable indicator Z is setto indicate the desired water contents, the said indicator Z will thereby indicate on the scale T the desired temperature to which the sugar juice or syrup is to be boiled.

2. An apparatus for use in sugar-boilingoperations, the saine consisting of fixed scales L T, one of the said scales indicating the degrees of vacuum and the other of the said scales indicating` degrees of temperature, a double sliding scale provided with an index stationary with respect thereto when the apparatus is in use, the said index cooperating with the scales L and T to show the boilingpoint of water at any desired degree of vacuum, the sliding scale having thereon degrees of temperature in excess of the boiling-point of waterand opposite the said degrees of temperature, a scale indicating the percentage ot' water in the syrup at that temperature and a movable index Z cooperating with the two scales of the sliding scale and the temperature-scale T, whereby by setting the fixed index of the sliding scale opposite the desired or existing vacuum in the vacuum-pan and setting the sliding index Z opposite the point on the water-percentage scale which indicates the desired water contents, the said index Z will indicate on the scale T, the degree to which the juice or syrup should boiled.

3. ln an apparatus for use in determining the proper boiling temperatures of sugarjuices, the combination of a temperaturescale and a vacuum-scale so arranged as to be conjointly readable and a sliding` scale provided with a plurality of indicators, one of the said indicators being` when inuse lixed with respect to the sliding scale and the other of the said indicators being movable with respect to the sliding scale, thesliding scale being provided with designations indicating water contents of syrnps, the movable indicator cooperating with the temperature-scale and with the scale of water contents, whereby when the indicator which is fixed with respect to the sliding scale is adjusted to indicate the existing vacuum on the vacuum -scalc and the movable indicator has been set to the desired water contents, the said movable indicator will also indicate the proper temperature at which to conduct the boiling operation, substantially as described.

In testimony that I claim the foregoing as my in ven tion l have signed my name, in presence of two witnesses, this 19th day of Deceniber, 1899.

HERMANN CLAASSEN. Yiitnesses:

WILLIAM EssENwniN, EMIL HOETTE. 

